One person was killed in a head-on collision that sparked a grass fire and halted traffic along Colo. 93 near the Flatirons Vista Trailhead late Monday afternoon.

Colorado State Patrol Sgt. Rob Madden said the collision occurred when a BMW traveling southbound along Colo. 93 drifted into oncoming traffic and collided head-on with a northbound semi-trailer truck. The collision and ensuing fire killed the BMW driver, Madden said.

Madden added that the semi-trailer truck driver managed to escape before the fire engulfed the cab of the vehicle and was taken to a local hospital with only minor injuries.

A third car was damaged from the collision's debris, officials said.

Emergency crews work the scene of a fatal traffic accident on Colo. 93 south of Eldorado Springs. (Paul Aiken/Staff Photographer)

Crews responded to a "fully engulfed" vehicle and semi-trailer truck that had sparked a small grass fire at 4:13 p.m., according to Colorado State Patrol Trooper Nate Reid, who said that they doused the cars and grass fire soon after arriving on scene.

Colo. 93 was closed between Colo. 128 and Colo. 72 for investigation while hazmat crews dealt with fuel leaking from the truck, according to officials, who said they expected the closure to last for a "significant amount of time."

"Please avoid the area and find alternate routes between Boulder and Golden," Boulder County Sheriff's Office tweeted on Monday afternoon.

Colo. 93 was not reopened as of 9 p.m. Monday, though Reid said the road should be cleaned up and cleared by Tuesday morning.

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